X-Ray Rotation Bearing Adjustment for Circular Motion Accuracy
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Solution Overview
Problem
The deformation of the outer race of the rolling bearing in conventional X-ray inspection apparatuses leads to a deviation of the rotation locus of the object being inspected from a perfect circle, resulting in reduced image reconstruction accuracy.
Innovation Solution
A rotation mechanism for X-ray inspection apparatuses featuring a rolling bearing with adjustable outer race, adjusted using multiple screws that deform the outer race to align the rotation locus with a perfect circle, and looseness preventing screws to maintain screw engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the outer race of the rolling bearing is press-fitted and fixed on the inner circumferential side of the outer race fixer, then the outer race can be fixed to the table holding member, but the outer race may deform depending on the shape of the inner circumferential surface of the outer race fixer
Solution Approach 1:
The patent applies preliminary action by providing adjustment members that can deform the outer race before final fixation. The adjustment members allow the outer race shape to be corrected in advance, ensuring both stable fixation and accurate circular shape are achieved together rather than in conflict
Solution Approach 2:
The patent applies parameter changes by enabling dynamic adjustment of the outer race shape through the adjustment members. The outer race can be deformed to change its shape parameters, allowing optimization of both the fixing stability and the rotational accuracy simultaneously
2Adaptability or versatility
If the outer race of the rolling bearing deforms, then the outer race can be adapted to the fixer shape, but the rotation loci of the inner race and the table rotating along the outer race greatly differ from a perfect circle
Solution Approach 1:
The adjustment members enable controlled parameter changes in the outer race shape. By adjusting the position and deformation of the outer race through these members, the system achieves both adaptability to the fixer and maintenance of accurate rotation loci
Solution Approach 2:
The patent implements feedback by allowing iterative adjustment of the outer race shape. The adjustment members enable continuous refinement of the outer race geometry based on observed rotation locus deviations, progressively improving both adaptability and precision
3Adaptability or versatility
If the rotation locus of the board greatly differs from a perfect circle, then the system can accommodate deformation, but the reconstructed image reconstructed on the basis of a plurality of images of the board acquired by the detector has reduced accuracy
Solution Approach 1:
The adjustment members enable preliminary correction of the outer race shape before image acquisition begins. This preliminary action ensures that the rotation locus is as circular as possible, thereby maintaining high image reconstruction accuracy from the start
Solution Approach 2:
The patent applies preliminary anti-action by preemptively correcting the outer race deformation that would otherwise cause rotation locus errors. The adjustment members counteract the deforming effect in advance, preventing image reconstruction accuracy degradation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism ensures the rotation locus of the object to be inspected closely resembles a perfect circle, enhancing image reconstruction accuracy by correcting for deformation-induced deviations.
Implementation Method 1
a rolling bearing (12) disposed between the table (10) and the table holding member (11)
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
[Problem to be solved] Provided is a rotation mechanism for an X-ray inspection apparatus that can bring the rotation locus of a rotating object to be inspected near to a perfect circle. [Solution] In the rotation mechanism for an X-ray inspection apparatus, a plurality of adjustment members 17 configured to adjust the shape of an outer race 15 of a bearing 12 by deforming the outer race 15 are arranged in a circumferential direction of the bearing 12. The adjustment members 17 are movable relative to an adjustment member holder 11c in a diameter direction of the bearing 12 and contactable with an outer circumferential surface of the outer race 15. A gap S configured to allow deformation of the outer race 15 is formed between the outer circumferential surface of the outer race 15 and the adjustment member holder 11c in the diameter direction of the bearing 12.